git/t/t6002-rev-list-bisect.sh

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#!/bin/sh
#
# Copyright (c) 2005 Jon Seymour
#
test_description='Tests git rev-list --bisect functionality'
revisions API: have release_revisions() release "cmdline" Extend the the release_revisions() function so that it frees the "cmdline" in the "struct rev_info". This in combination with a preceding change to free "commits" and "mailmap" means that we can whitelist another test under "TEST_PASSES_SANITIZE_LEAK=true". There was a proposal in [1] to do away with xstrdup()-ing this add_rev_cmdline(), perhaps that would be worthwhile, but for now let's just free() it. We could also make that a "char *" in "struct rev_cmdline_entry" itself, but since we own it let's expose it as a constant to outside callers. I proposed that in [2] but have since changed my mind. See 14d30cdfc04 (ref-filter: fix memory leak in `free_array_item()`, 2019-07-10), c514c62a4fd (checkout: fix leak of non-existent branch names, 2020-08-14) and other log history hits for "free((char *)" for prior art. This includes the tests we had false-positive passes on before my 6798b08e848 (perl Git.pm: don't ignore signalled failure in _cmd_close(), 2022-02-01), now they pass for real. Since there are 66 tests matching t/t[0-9]*git-svn*.sh it's easier to list those that don't pass than to touch most of those 66. So let's introduce a "TEST_FAILS_SANITIZE_LEAK=true", which if set in the tests won't cause lib-git-svn.sh to set "TEST_PASSES_SANITIZE_LEAK=true. This change also marks all the tests that we removed "TEST_FAILS_SANITIZE_LEAK=true" from in an earlier commit due to removing the UNLEAK() from cmd_format_patch(), we can now assert that its API use doesn't leak any "struct rev_info" memory. This change also made commit "t5503-tagfollow.sh" pass on current master, but that would regress when combined with ps/fetch-atomic-fixup's de004e848a9 (t5503: simplify setup of test which exercises failure of backfill, 2022-03-03) (through no fault of that topic, that change started using "git clone" in the test, which has an outstanding leak). Let's leave that test out for now to avoid in-flight semantic conflicts. 1. https://lore.kernel.org/git/YUj%2FgFRh6pwrZalY@carlos-mbp.lan/ 2. https://lore.kernel.org/git/87o88obkb1.fsf@evledraar.gmail.com/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-04-13 20:01:47 +00:00
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-t6000.sh # t6xxx specific functions
# usage: test_bisection max-diff bisect-option head ^prune...
#
# e.g. test_bisection 1 --bisect l1 ^l0
#
test_bisection_diff()
{
_max_diff=$1
_bisect_option=$2
shift 2
_bisection=$(git rev-list $_bisect_option "$@")
_list_size=$(git rev-list "$@" | wc -l)
_head=$1
shift 1
_bisection_size=$(git rev-list $_bisection "$@" | wc -l)
[ -n "$_list_size" -a -n "$_bisection_size" ] ||
error "test_bisection_diff failed"
# Test if bisection size is close to half of list size within
# tolerance.
#
_bisect_err=$(expr $_list_size - $_bisection_size \* 2)
test "$_bisect_err" -lt 0 && _bisect_err=$(expr 0 - $_bisect_err)
_bisect_err=$(expr $_bisect_err / 2) ; # floor
test_expect_success \
"bisection diff $_bisect_option $_head $* <= $_max_diff" \
'test $_bisect_err -le $_max_diff'
}
date >path0
git update-index --add path0
save_tag tree git write-tree
on_committer_date "00:00" hide_error save_tag root unique_commit root tree
on_committer_date "00:01" save_tag l0 unique_commit l0 tree -p root
on_committer_date "00:02" save_tag l1 unique_commit l1 tree -p l0
on_committer_date "00:03" save_tag l2 unique_commit l2 tree -p l1
on_committer_date "00:04" save_tag a0 unique_commit a0 tree -p l2
on_committer_date "00:05" save_tag a1 unique_commit a1 tree -p a0
on_committer_date "00:06" save_tag b1 unique_commit b1 tree -p a0
on_committer_date "00:07" save_tag c1 unique_commit c1 tree -p b1
on_committer_date "00:08" save_tag b2 unique_commit b2 tree -p b1
on_committer_date "00:09" save_tag b3 unique_commit b2 tree -p b2
on_committer_date "00:10" save_tag c2 unique_commit c2 tree -p c1 -p b2
on_committer_date "00:11" save_tag c3 unique_commit c3 tree -p c2
on_committer_date "00:12" save_tag a2 unique_commit a2 tree -p a1
on_committer_date "00:13" save_tag a3 unique_commit a3 tree -p a2
on_committer_date "00:14" save_tag b4 unique_commit b4 tree -p b3 -p a3
on_committer_date "00:15" save_tag a4 unique_commit a4 tree -p a3 -p b4 -p c3
on_committer_date "00:16" save_tag l3 unique_commit l3 tree -p a4
on_committer_date "00:17" save_tag l4 unique_commit l4 tree -p l3
on_committer_date "00:18" save_tag l5 unique_commit l5 tree -p l4
git update-ref HEAD $(tag l5)
# E
# / \
# e1 |
# | |
# e2 |
# | |
# e3 |
# | |
# e4 |
# | |
# | f1
# | |
# | f2
# | |
# | f3
# | |
# | f4
# | |
# e5 |
# | |
# e6 |
# | |
# e7 |
# | |
# e8 |
# \ /
# F
on_committer_date "00:00" hide_error save_tag F unique_commit F tree
on_committer_date "00:01" save_tag e8 unique_commit e8 tree -p F
on_committer_date "00:02" save_tag e7 unique_commit e7 tree -p e8
on_committer_date "00:03" save_tag e6 unique_commit e6 tree -p e7
on_committer_date "00:04" save_tag e5 unique_commit e5 tree -p e6
on_committer_date "00:05" save_tag f4 unique_commit f4 tree -p F
on_committer_date "00:06" save_tag f3 unique_commit f3 tree -p f4
on_committer_date "00:07" save_tag f2 unique_commit f2 tree -p f3
on_committer_date "00:08" save_tag f1 unique_commit f1 tree -p f2
on_committer_date "00:09" save_tag e4 unique_commit e4 tree -p e5
on_committer_date "00:10" save_tag e3 unique_commit e3 tree -p e4
on_committer_date "00:11" save_tag e2 unique_commit e2 tree -p e3
on_committer_date "00:12" save_tag e1 unique_commit e1 tree -p e2
on_committer_date "00:13" save_tag E unique_commit E tree -p e1 -p f1
on_committer_date "00:00" hide_error save_tag U unique_commit U tree
on_committer_date "00:01" save_tag u0 unique_commit u0 tree -p U
on_committer_date "00:01" save_tag u1 unique_commit u1 tree -p u0
on_committer_date "00:02" save_tag u2 unique_commit u2 tree -p u0
on_committer_date "00:03" save_tag u3 unique_commit u3 tree -p u0
on_committer_date "00:04" save_tag u4 unique_commit u4 tree -p u0
on_committer_date "00:05" save_tag u5 unique_commit u5 tree -p u0
on_committer_date "00:06" save_tag V unique_commit V tree -p u1 -p u2 -p u3 -p u4 -p u5
test_sequence()
{
_bisect_option=$1
test_bisection_diff 0 $_bisect_option l0 ^root
test_bisection_diff 0 $_bisect_option l1 ^root
test_bisection_diff 0 $_bisect_option l2 ^root
test_bisection_diff 0 $_bisect_option a0 ^root
test_bisection_diff 0 $_bisect_option a1 ^root
test_bisection_diff 0 $_bisect_option a2 ^root
test_bisection_diff 0 $_bisect_option a3 ^root
test_bisection_diff 0 $_bisect_option b1 ^root
test_bisection_diff 0 $_bisect_option b2 ^root
test_bisection_diff 0 $_bisect_option b3 ^root
test_bisection_diff 0 $_bisect_option c1 ^root
test_bisection_diff 0 $_bisect_option c2 ^root
test_bisection_diff 0 $_bisect_option c3 ^root
test_bisection_diff 0 $_bisect_option E ^F
test_bisection_diff 0 $_bisect_option e1 ^F
test_bisection_diff 0 $_bisect_option e2 ^F
test_bisection_diff 0 $_bisect_option e3 ^F
test_bisection_diff 0 $_bisect_option e4 ^F
test_bisection_diff 0 $_bisect_option e5 ^F
test_bisection_diff 0 $_bisect_option e6 ^F
test_bisection_diff 0 $_bisect_option e7 ^F
test_bisection_diff 0 $_bisect_option f1 ^F
test_bisection_diff 0 $_bisect_option f2 ^F
test_bisection_diff 0 $_bisect_option f3 ^F
test_bisection_diff 0 $_bisect_option f4 ^F
test_bisection_diff 0 $_bisect_option E ^F
test_bisection_diff 1 $_bisect_option V ^U
test_bisection_diff 0 $_bisect_option V ^U ^u1 ^u2 ^u3
test_bisection_diff 0 $_bisect_option u1 ^U
test_bisection_diff 0 $_bisect_option u2 ^U
test_bisection_diff 0 $_bisect_option u3 ^U
test_bisection_diff 0 $_bisect_option u4 ^U
test_bisection_diff 0 $_bisect_option u5 ^U
#
# the following illustrates Linus' binary bug blatt idea.
#
# assume the bug is actually at l3, but you don't know that - all you know is that l3 is broken
# and it wasn't broken before
#
# keep bisecting the list, advancing the "bad" head and accumulating "good" heads until
# the bisection point is the head - this is the bad point.
#
test_output_expect_success "$_bisect_option l5 ^root" 'git rev-list $_bisect_option l5 ^root' <<EOF
c3
EOF
test_output_expect_success "$_bisect_option l5 ^root ^c3" 'git rev-list $_bisect_option l5 ^root ^c3' <<EOF
b4
EOF
test_output_expect_success "$_bisect_option l5 ^root ^c3 ^b4" 'git rev-list $_bisect_option l5 ^c3 ^b4' <<EOF
l3
EOF
test_output_expect_success "$_bisect_option l3 ^root ^c3 ^b4" 'git rev-list $_bisect_option l3 ^root ^c3 ^b4' <<EOF
a4
EOF
test_output_expect_success "$_bisect_option l5 ^b3 ^a3 ^b4 ^a4" 'git rev-list $_bisect_option l3 ^b3 ^a3 ^a4' <<EOF
l3
EOF
#
# if l3 is bad, then l4 is bad too - so advance the bad pointer by making b4 the known bad head
#
test_output_expect_success "$_bisect_option l4 ^a2 ^a3 ^b ^a4" 'git rev-list $_bisect_option l4 ^a2 ^a3 ^a4' <<EOF
l3
EOF
test_output_expect_success "$_bisect_option l3 ^a2 ^a3 ^b ^a4" 'git rev-list $_bisect_option l3 ^a2 ^a3 ^a4' <<EOF
l3
EOF
# found!
#
# as another example, let's consider a4 to be the bad head, in which case
#
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4" 'git rev-list $_bisect_option a4 ^a2 ^a3 ^b4' <<EOF
c2
EOF
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4 ^c2" 'git rev-list $_bisect_option a4 ^a2 ^a3 ^b4 ^c2' <<EOF
c3
EOF
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4 ^c2 ^c3" 'git rev-list $_bisect_option a4 ^a2 ^a3 ^b4 ^c2 ^c3' <<EOF
a4
EOF
# found!
#
# or consider c3 to be the bad head
#
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4" 'git rev-list $_bisect_option a4 ^a2 ^a3 ^b4' <<EOF
c2
EOF
test_output_expect_success "$_bisect_option c3 ^a2 ^a3 ^b4 ^c2" 'git rev-list $_bisect_option c3 ^a2 ^a3 ^b4 ^c2' <<EOF
c3
EOF
# found!
}
test_sequence "--bisect"
#
#
test_expect_success 'set up fake --bisect refs' '
git update-ref refs/bisect/bad c3 &&
good=$(git rev-parse b1) &&
git update-ref refs/bisect/good-$good $good &&
good=$(git rev-parse c1) &&
git update-ref refs/bisect/good-$good $good
'
test_expect_success 'rev-list --bisect can default to good/bad refs' '
# the only thing between c3 and c1 is c2
git rev-parse c2 >expect &&
git rev-list --bisect >actual &&
test_cmp expect actual
'
test_expect_success 'rev-parse --bisect can default to good/bad refs' '
git rev-parse c3 ^b1 ^c1 >expect &&
git rev-parse --bisect >actual &&
# output order depends on the refnames, which in turn depends on
# the exact sha1s. We just want to make sure we have the same set
# of lines in any order.
sort <expect >expect.sorted &&
sort <actual >actual.sorted &&
test_cmp expect.sorted actual.sorted
'
test_output_expect_success '--bisect --first-parent' 'git rev-list --bisect --first-parent E ^F' <<EOF
e4
EOF
test_output_expect_success '--first-parent' 'git rev-list --first-parent E ^F' <<EOF
E
e1
e2
e3
e4
e5
e6
e7
e8
EOF
test_output_expect_success '--bisect-vars --first-parent' 'git rev-list --bisect-vars --first-parent E ^F' <<EOF
bisect_rev='e5'
bisect_nr=4
bisect_good=4
bisect_bad=3
bisect_all=9
bisect_steps=2
EOF
test_expect_success '--bisect-all --first-parent' '
cat >expect.unsorted <<-EOF &&
$(git rev-parse E) (tag: E, dist=0)
$(git rev-parse e1) (tag: e1, dist=1)
$(git rev-parse e2) (tag: e2, dist=2)
$(git rev-parse e3) (tag: e3, dist=3)
$(git rev-parse e4) (tag: e4, dist=4)
$(git rev-parse e5) (tag: e5, dist=4)
$(git rev-parse e6) (tag: e6, dist=3)
$(git rev-parse e7) (tag: e7, dist=2)
$(git rev-parse e8) (tag: e8, dist=1)
EOF
# expect results to be ordered by distance (descending),
# commit hash (ascending)
sort -k4,4r -k1,1 expect.unsorted >expect &&
git rev-list --bisect-all --first-parent E ^F >actual &&
test_cmp expect actual
'
test_done